Skills > MetalWorking Metal Working
When I imagined metalworking I was sure it was out of my price range. Huge Lathes and shapers are what usually come to mind.
The good news is you can start small and work your way up the same as other skills. A grinder would be an excellent cheap tool to start with. You may even already have a vice from woodworking. Together you are on your way.
There are lots of tutorials on Youtube catering to people looking to build their own workshop.